/*
 * Copyright 2024 LinQingYing. and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of this source code is governed by the Apache License 2.0,
 * which allows users to freely use, modify, and distribute the code,
 * provided they adhere to the terms of the license.
 *
 * The software is provided "as-is", and the authors are not responsible for
 * any damages or issues arising from its use.
 *
 */

package com.linqingying.cangjie.ide.refactoring.move

import com.linqingying.cangjie.psi.CjNamedDeclaration
import com.intellij.psi.PsiElement
import com.intellij.usageView.UsageInfo
import com.intellij.util.containers.MultiMap

sealed interface CangJieMoveDeclarationDelegate {
    fun collectConflicts(
        moveTarget: CangJieMoveTarget,
        internalUsages: MutableSet<UsageInfo>,
        conflicts: MultiMap<PsiElement, String>
    ) {
    }

    fun getContainerChangeInfo(
        originalDeclaration: CjNamedDeclaration,
        moveTarget: CangJieMoveTarget
    ): MoveContainerChangeInfo

    fun findInternalUsages(moveSource: CangJieMoveSource): List<UsageInfo> = emptyList()

    object TopLevel : CangJieMoveDeclarationDelegate {
        override fun getContainerChangeInfo(
            originalDeclaration: CjNamedDeclaration,
            moveTarget: CangJieMoveTarget
        ): MoveContainerChangeInfo {
            val sourcePackage = MoveContainerInfo.Package(originalDeclaration.getContainingCjFile().packageFqName)
            val targetPackage = moveTarget.targetContainerFqName?.let { MoveContainerInfo.Package(it) }
                ?: MoveContainerInfo.UnknownPackage
            return MoveContainerChangeInfo(sourcePackage, targetPackage)
        }
    }

}
